Belt pullley decoupler with springs connected in parallel

Abstract

A belt pulley decoupler for a motor vehicle drive train, having a hub, a traction pulley having a traction-means receiving contour and being accommodated to rotate about an axis of rotation relative to the hub. The decoupler may include a plurality of bow springs supporting the traction pulley relative to the hub in a direction of rotation, at least one first bow spring being arranged offset in an axial direction and/or a radial direction of the axis of rotation to a second bow spring acting parallel to the first bow spring, and a vibration damping device conjointly connected by means of a carrier to the hub and accommodated on a sleeve-like receiving region of the carrier. The receiving region of the carrier projecting in the axial direction, at least partially, beyond the torque transfer region of the traction pulley.

1 . A belt pulley decoupler for a motor vehicle drive train, comprising:
 a hub,   a traction pulley having a traction-means receiving contour and being configured to rotate about an axis of rotation relative to the hub,   a plurality of bow springs supporting the traction pulley relative to the hub in a direction of rotation, at least one first bow spring being arranged offset in an axial direction or a radial direction of the axis of rotation to a second bow spring acting parallel to the first bow spring, and   a vibration damping device conjointly connected by a carrier to the hub and accommodated on a sleeve-like receiving region of the carrier, wherein the receiving region of the carrier projects in the axial direction, at least partially, beyond a torque transfer region of the traction pulley, the torque transfer region forming the traction-means receiving contour and extending in the axial direction, and also beyond at least one of the bow springs.   
     
     
         2 . The belt pulley decoupler according to  claim 1 , wherein the receiving region projects with its free end into an intermediate space formed radially between the torque transfer region and at least one support region supported on the first bow spring of the traction pulley. 
     
     
         3 . The belt pulley decoupler according to  claim 2 , wherein the at least one support region is formed by a base body of the traction pulley which directly forms the traction-means receiving contour. 
     
     
         4 . The belt pulley decoupler according to  claim 2 , wherein a friction device is actively inserted between the carrier and the traction pulley. 
     
     
         5 . The belt pulley decoupler according to  claim 1 , wherein the vibration damping device is partially or completely arranged radially inside the torque transfer region. 
     
     
         6 . The belt pulley decoupler according to  claim 1 , wherein the first bow spring is arranged radially inside the receiving region. 
     
     
         7 . The belt pulley decoupler according to  claim 6 , wherein the first bow spring is at least partially accommodated in an axial hollow space formed by the carrier. 
     
     
         8 . The belt pulley decoupler according to  claim 1 , wherein the second bow spring is arranged in the radial direction at the same height as the first bow spring or is arranged further outwards in the radial direction than the first bow spring. 
     
     
         9 . The belt pulley decoupler according to  claim 1 , wherein the second bow spring is arranged in the axial direction next to the receiving region and in the radial direction at a height of the receiving region or is arranged in the radial direction inside the receiving region. 
     
     
         10 . The belt pulley decoupler according to  claim 1 , wherein the receiving region extends so far in the axial direction that it overlaps both the first bow spring and at least part of the second bow spring in the axial direction. 
     
     
         11 . The belt pulley decoupler according to  claim 2 , wherein the at least one support region is formed by an element connected to a base body of the traction pulley. 
     
     
         12 . The belt pulley decoupler according to  claim 1 , wherein the receiving region projects with its free end into an intermediate space formed radially between support regions of the first and second bow springs of the traction pulley.